|Stainless Steel||Tradename||UNS no.||Werkstoff No.||Density (g/cm3)|
DM Special Steel Ltd is a leading manufacturer and supplier of stainless steel 904L buttweld pipe fittings and 904L flanges. DM Special Steel Ltd offers a complete range of stainless steel 904L pipe fittings such as SS 904L reducer, SS 904L elbow, SS 904L tee, SS 904L cross, SS 904L end caps, SS 904L stub ends and SS 904L pipe bends. Stainless steel 904L pipe fittings are manufactured in compliance with ASTM B 366/ASME SB 366 and ANSI B16.9 / 16.28/ MSS SP-43 / Welding Bevel Standards ANSI B 16.25.
We specialise in the manufacture and supply of SS 904L pipe bends in both standard and non standard sizes, with bending radius of 1D to 10D or any other custom bending radius. We offer ex-stock delivery of various standard size and type SS 904L pipe fittings, SS 904L flanges and SS 904L pipe bends. Our specialty is to manufacture and supply large size fabricated 100% radiography tested SS 904L elbows, SS 904L reducers, SS 904L tees and SS 904L large diameter fabricated pipes.
UNS NO8904, commonly known as 904L stainless steel, is a low carbon austenitic nickel-chromium stainless steel with additions of molybdenum and copper. 904L pipe fittings, 904L flanges and 904L product forms are mainly used where the corrosion resistant properties of 316L and 317L are inadequate, especially in severe corrosive conditions.
Due to the combination of high contents of chromium, nickel, molybdenum and copper, stainless steel 904L pipe fittings and 904L flanges exhibit greater resistance to pitting and crevice corrosion and to general corrosion in reducing acids.
When compared to 05 grade duplex stainless steel, 904L has similar corrosion resistant properties but lower mechanical strength. 05 is also a lower cost option compared to 904L, but is not suitable for temperatures above 300°C. Overall among the three grades i.e. 904L, 316L and 05, 316L stainless steel is the lowest cost option, but offers comparatively lower corrosion resistance.
Stainless steel 904L fittings, and 904L flanges are widely used for manufacturing tanks, vessels, piping, heat exchangers, and other equipment used for handling sulphuric, phosphoric and acetic acids, bleaching operations in the pulp and paper industry. In addition, 904L tube and 904L pipe fittings are widely used for general piping requirements in the oil and gas, chemical and pharmaceutical industries.
DM Special Steel Ltd also stocks and supplies a complete range of SS 904L seamless pipes to complement our existing production range of SS 904L buttweld fittings and SS 904L flanges. Stainless steel 904L pipes can be supplied in cut to length sizes and also machined or fabricated to meet your custom piping requirements.
|Specification||ASTM B 366 / ASME SB 366|
|Type||Seamless / Welded / Fabricated|
|Bending Radius||R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom|
|Range||½QNB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS.|
|Dimensions||ANSI/ASME B16.9, B16.28, MSS-SP-43.|
Seamless/ Welded 100% Radiography Tested
|SS 904L Elbows – Long Radius||SS 904L Stub Ends||
Sizes 1/2″ – 48″
|SS 904L Elbows – Short Radius||SS 904L Crosses|
|SS 904L Reducing Elbows||SS 904L Reducing Crosses|
|SS 904L 45° Elbows||SS 904L 180° LR Return Bends|
|SS 904L Tees||SS 904L 180° SR Return Bends|
|SS 904L Fabricated Tees||SS 904L Pipe Bends / Piggable Bends|
|SS 904L Reducers||SS 904L Couplings|
|SS 904L Concentric Reducers||SS 904L Pipe Nipples|
|SS 904L Eccentric Reducers||SS 904L Forged/Plate Cut Rings|
|SS 904L 3D Elbow||SS 904L End Caps|
|SS 904L 5D Elbow||SS 904L Forged / Plate Circles|
Threaded and Socket Weld Pipe Fittings
|SS 904L 90° Elbows||SS 904L Couplings||
Sizes 1/8″ – 4″
Pressure Ratings –
|SS 904L 45° Elbows||SS 904L Reducers|
|SS 904L Street Elbows||SS 904L Inserts|
|SS 904L Tees||SS 904L Caps|
|SS 904L Crosses||SS 904L Unions|
Forged and Plate Flanges
|Specification||ASTM A240, ASME SA240, ASTM B 649 / ASME SB 649|
|Standard||ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.|
|Size||1/8″ to 36″|
|Dimensions||ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.|
|Class / Pressure||150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.|
|SS 904L Slip-On Flanges||SS 904L Threaded Flanges||
1/8″ – 36″
Raised Face or Flat Face
|SS 904L Weld Neck Flanges||SS 904L Socket Weld Flanges|
|SS 904L Blind Flanges||SS 904L Reducing Flanges|
|SS 904L Lap Joint Flanges||SS 904L Plate Flanges|
Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All fittings and flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.
At DM Special Steel Ltd, all fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.
Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report